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| author | Jeffrey Wilcke <jeffrey@ethereum.org> | 2017-02-18 01:39:43 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-02-18 01:39:43 +0800 |
| commit | bf21549faa7de6e2b920855468b14856c6f503c4 (patch) | |
| tree | d32e4de3a3d00927744aa43e6ba2aaf526b40b36 /common/math/integer.go | |
| parent | 6f74fb962e68ad975289a604a89239c6376fa5e3 (diff) | |
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common/math: "optimised" SafeMul and added comment on Exp (#3675)
Diffstat (limited to 'common/math/integer.go')
| -rw-r--r-- | common/math/integer.go | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/common/math/integer.go b/common/math/integer.go index 8162b1985..1689b6586 100644 --- a/common/math/integer.go +++ b/common/math/integer.go @@ -18,8 +18,8 @@ func SafeAdd(x, y uint64) (uint64, bool) { // SafeMul returns multiplication result and whether overflow occurred. func SafeMul(x, y uint64) (uint64, bool) { - if x == 0 { + if x == 0 || y == 0 { return 0, false } - return x * y, x != 0 && y != 0 && y > gmath.MaxUint64/x + return x * y, y > gmath.MaxUint64/x } |